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    <p>Google app engine (Gae) does support XMPP just as <strong>CLIENT</strong>.</p> <p>With XMPP <a href="http://code.google.com/intl/it/appengine/docs/java/xmpp/overview.html" rel="noreferrer">Gae JAVA client</a> feature you can:</p> <p><strong>SEND MESSAGE</strong></p> <pre><code>JID jid = new JID("youraccount@jabber.org"); Message msg = new MessageBuilder() .withRecipientJids(jid) .withBody("Hello i'm a fancy GAE app, how are you?") .build(); XMPPService xmpp = XMPPServiceFactory.getXMPPService(); if (xmpp.getPresence(jid).isAvailable()) { SendResponse status = xmpp.sendMessage(msg); } </code></pre> <p><strong>RECEIVE MESSAGE</strong></p> <pre><code>public class XMPPReceiverServlet extends HttpServlet { public void doPost(HttpServletRequest req, HttpServletResponse res) throws IOException { XMPPService xmpp = XMPPServiceFactory.getXMPPService(); Message message = xmpp.parseMessage(req); JID fromJid = message.getFromJid(); String body = message.getBody(); //Save to Big Table } } </code></pre> <p>Remember that JIDs can just be <em>yourappid@appspot.com</em> OR <em>foo@yourappid.appspotchat.com</em> because Google domains are not supported yet.</p> <p>For example, you could craft a toy Gae application with a simple page with:</p> <ol> <li>An html form to send text </li> <li>An html table that display the list of messages received and stored to big table.</li> </ol> <p>To test your application:</p> <ol> <li>Create an account on jabber.org</li> <li>Download Smack</li> <li>Try to send a message from Smack to yourappid@appspot.com</li> <li>Try to send a message from Gae App to youraccount@jabber.org</li> </ol> <p>In case you have your personal XMPP server (openfire) up and running, simply skip step 1 and use your domain account to receive message from your fancy Gae App.</p> <p>Have a look to XMPP <a href="http://en.wikipedia.org/wiki/Xmpp#Message_delivery_scenario" rel="noreferrer">message delivery</a> to understand how this works.</p>
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    1. POimplementing GAE XMPP service as an external component to an existing XMPP server (e.g. ejabberd or OpenFire)
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    1. CO@systempuntoout, can you comment on this post http://stackoverflow.com/questions/2570800/appspot-xmpp-talk-with-jabber-org
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